Albert solo



PATENTED SEPT..20, 1904.

A. SOLO. COMBINED GALIPERS AND DIVIDERS.

1 APPLICATION FILED MAY 5. 1904. N0 MODEL.

Patented September 20, 1904.

PATENT OFFICE.

ALBERT SOL O, OF NEW YORK, N. Y.

' COMBINED CALIPERS AND DIVIDERS.

SPECIFICATION forming part of Letters Patent No. 770,544, dated September 20, 1904.

I Application filed May 5, 1904. -Serial No. 206,439. (No model.)

To all whom, it may concern.-

Be it known that I, ALBERT SOLO, a citizen of the Kingdom of Norway, residing in New York, borough of Brooklyn, in the State of New York, have invented certain new and useful Improvements in Combined Calipers and Dividers, of which the following is a specifif cation.

. Among the objects of my invention is the provision of an instrument which can be readily employed as either a divider or a calipers by the simple interchanging of some of its parts. It is a well-known fact that machinists, pattern-makers, and carpenters use both of the instruments referred to, and my invention aims to obviate the necessity of employing two separate instruments, and consequently to provide a device extremely convenient in use.

A further object of the invention is to provide a combined calipers and dividers having means for setting the same at approximately the desired measurement and means for then obtaining a final and more accurate ad justment of the same. I

The invention also comprises certain structural details and combinations of .parts to be hereinafter described, and pointed out in the appended claims.

In the accompanying drawings, Figure 1 is a frontelevation of the instrument arranged as a dividers and shown in closed position. Fig. 2 is a front elevation showing the instrument used as a calipers and in operative position. Fig. 3 is a side elevation of the instrument arranged as in Fig. 1. Fig. 4is a horizontal section of the wedge member taken on line 4 4, Fig. 1. Fig. 5 is a vertical section on line 5 5,Fig. 3. Fig. 6 is a vertical section of the pivot, taken on line 6 6, Fig. 5. Fig. 7 is a detail side elevation of the ends of the divider and caliper legs arranged as shown in Fig. 2.

Similar characters of reference designate identical parts throughout the several views.

Referring to the drawings, a a designate,

the legs of the instrument, which are provided with inclined portions 19 and secured in the usual way to a pivot 6 by flat springs, which engages the usual notches in the legs and normally holds the instrument in closed position. Rotatable in an opening 0 in pivot b is an adjusting-spindle 0, which is prevented from moving longitudinally by collars y, fast thereon, which engage the pivot at either side of the same. Spindle 0 passes from an opening 0 in spring 8 through the pivot and has a threaded portion t disposed between legs a at opposite the inclined portions p. A wedge member w, having its periphery engaging the inclined portions 19 of the legs a a, is adjustable upon the screw-spindie o and by its rela tive position on said spindle regulates the position of legs a a. The wedge member w has on its periphery adjacent to the contactsurface it flanges f to retain the inclined portions of the legs a-a against the surface it.

The wedge member w consists of an exterior cylindrical portion or shell and an interior slightly-tapering member w, guided in a correspondingly-shaped socket r of the exterior shell, said interior member being provided with a partially interiorly-threaded opening 0 of somewhat-larger diameter than the spindle 0 and through which the latter passes, together with the openings 0 in the shell alined therewith, as shown iii Fig. 5. The interiorly-threaded member w rests in a spiral spring y, that is interposed between it and the bottom of the recess in the outer shell, so as to normally press the threads of said interiorly-threaded member, which are on the same side of opening '0 as said spring, into engagement with the spindle. Both of the members w and .w are thus held on the spindle by means of their alinedopenings, vand the member w, having the partiallythreaded opening 0*, may be pushed inwardly against the tension of spring y, so as to cause the disengagement of the spindle. It is obvious that the workman may by a slight pressure of the thumb secure this result and quickly slide the wedge member along the spindle, while simultaneously the legs are placedby the hands in the desired position and permitted to abut against the wedge member. In order to guard against the detaching of the wedge member from the spindle and to limit the movement of said member thereon, a terminal nut z is secured on the end of the spindle.

For rendering the instrument capable of fine adjustment a milled head it is placed upon the outer end of the spindle, whereby the latter may be turned to adjust the member w to a greater nicety. As the spindle 0 does not advance through the pivot 6, (being held by means of collars 7', as before stated,) this member may be advanced or withdrawn through distances which are scarcely perceptible. It is obvious that by regulating the pitch of threads on spindle c and member 20 any desired degree of accuracy may be obtained.

The legs a a of my improved instrument are of essentially rectangular cross-section and are provided with points m, which are employed when distances are to be measured off or an outside measurement of an object taken. In order to provide means for taking inside measurements, caliper-legs n are provided. These are also of substantially rectangular cross-section and are secured to the legs a a by means of headed fastenings, illustrated as screws, which pass through slots 9 therein and clamp the divider and caliper legs snugly together. Caliper-legs n are also provided with small outward extensions m having minute holes of for engaging the dividerpoints when in position for use, as shown in Fig. 2. By securing the caliper-legs a at both ends, as described, a rigid fastening is insured. Recesses r in the legs a a are provided for the accommodation of extensions m when the caliper-legs are in inoperative position, as shown in Fig. 1.

In order to preserve a measurement which has been taken, the pivot b is provided with an interior sleeve .9 which surrounds spindle 0, and fast to this sleeve is secured a screwbolt 6 which is engaged by a screw-nut b normally resting against pivot Z), as shown in Fig. 6. By turning this nut b the screw-bolt is moved outwardly,carrying with it the sleeve 8 so that the latter is brought into frictional contact with a spindle 0 and locks the same against displacement.

The operation of my improved instrument is as follows: Supposing the instrument is arranged as a dividers or outside calipers, as shown in Fig. 1', and it is desired to take an inside measurement with the caliper-legs, the legs a e are taken hold of by the hands and the wedge member w is adjusted along the spindle by pressing with the thumb of one hand the interior member w, so that it releases the spindle and permits the legs to be forced apart. The fastenings q are then loosened and the caliper-legs turned through an angle of one hundred and eighty degrees until the minute openings m are engaged by the divider-points. The caliper-legs are then again clamped by fastening members q. The

instrument is then set by sliding member is along the spindle until the desired measurement is approximated, and then the milled head a is turned until the legs are adjusted to a nicety. hen the instrument is to be used as a dividers, the caliper-arms are returned to the position shown in Fig. 1, in which the extensions fitinto the recess 7*. In some cases, such as when measuring the radii of solid bodies, the device may be arranged as a hermaphrodite instrument by using a divider-point and a caliper-leg at the same time. In order to clamp the spindle 0 again against displacement, the screw-nut?) is tightened, and the instrument is then proof against the effects of jarring, &c., which would otherwise be apt to change the measurement.

It will be seen by the foregoing description that by this invention a device is 'n'ovided which can be used with equal accuracy and facility as a calipers or as a pair of dividers. The instrument may be manufactured at a less cost than the separate instruments whose functions it performs, and the invention places in the hands of the machinist, patternqnaker, and carpenter a device in many ways superior to those now in use.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. Ameasuring instrument comprising pivoted divider-legs having recesses therein, and caliper-legs reversibly attached to said d ividerlegs and having extensions thereon engaging said recesses when in inoperative position.

2. A measuringinstrumentcomprising pivoted divider-legs, headed fasteningmembers on said legs, and caliper-legs attached to said divider-legs. said caliper-legs having slots ongaging said headed fastening members.

8. A measuring instrument comprising pivoted divider-legs having pointed ends, and caliper-legs reversibly attached to said dividerlegs, said caliper-legs having means at their ends for engaging said divider ends when the former are in operative position.

4. Ameasuringinstrument, comprisingpivoted divider-legs, and caliper-legs reversibly attached to the inner surfaces thereof, said caliper-legs having terminal extensions engaging and projecting outwardly beyond said divider-legs when said caliper-legs are in operative position.

5. A measuring instrument, comprising a pivot, spring-actuated legs bearing against the same, a depending screw-spindle rotatable in said pivotand disposed between said legs, and a leg controlling wedge member having threads engaging said spindle, said wedge member having its outer surface bearing against the inner surfaces of said legs below said pivot.

6. A measuring instrument, comprising a pivot, spring-actuated legs bearing against the ing said screw-spindle and slidably adjustable along the same. v

8. A measuring instrument comprising sprlng-actuatedlegs, a p1vot to which sald legs are applied, a screw-spindle rotatable in saidpivot and disposed between said legs, a wedge member for controlling said legs composed of anouter shell and an interior member having a partially-threaded opening, and means on 20 the exterior member for normally forcing said interior member into engagement with the threads on said screw-spindle.

9. A- measuring instrument comprising spring-actuated legs, a pivot to which said legs 5 are'applied, ascrew-spindle rotatable in said i l pivot, a wedge member on said spindle, a sleeve insaid pivot movable with respect to. said spindle, and means for forcing said sleeve into frictional engagement with said spindle. 3

In testimony that I claim the foregoing as my invention I have signed my name in presence oftwo subscribing witnesses.

ALBERT SOLO. 

